Adjusting device for draft-regulators for steam-boilers.



APPLICATION FILED JULY 20.19I4- Patented June 22, 1915.

mains n. sunmvlaru, or rnw'rucmr, onn ISLAND.

amass.

specification of Letters Patent.

- Patent June as, rare.

Application and Italy to, ma. Serial no. traces.

To all whom it may comem:

Be it known that I, JAMns E. SULLIVAN, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Adjusting Devices for Draft-Regulators for Steam-Boilers, of which the following is a specification.

My invention relates to improvements 1 n adjusting devices for draft regulators tor steam boilers, and the purpose of my mvention is to provide a method by whlch the extent of the opening and closing of dampers by means of the ordinary diaphragm arm may be quickly and accurately adjusted to meet changes in temperature. I accomplish this object by the device shown in the accompanying drawing, in which-- Figure 1 is an elevation of an ordinary heating boiler showing the damper-regulating diaphragm and lever with my adjusting device attached fragmentary elevation about one half the full size of my device. Fig. 3, a view of the same from above, showing a horizontal section of the pulley b of the device. Fig. a, a vertical section through the line was of Fig. 2. Fig. 5, a detail of the pulley 6, showing the friction spring d, and Fig. 6, a vertical section through the line y-y of Fig. 1.

The same parts are indicated by the same letters throughout the several views.

My device is intended and adapted to be attached to the lever of an ordinary dia phragm damper-regulator such as is used on most heating boilers. Consequently in Fig. 1 the only new matter disclosed is my device a, b, 0, attached as shown to the outer or free lover of the damper-regulator, the other parts of the diaphragm regulator be ing the pivot p, and diaphragm piston t, and'the weight r; It is the fire door and it a flap draft mthe fire door, having the ordinary slides 71. and the lifter attachment k Z at the lower part is an ash box damper having the attached lifter Z; t is a cord or chain attached. to the lifter l, thence running two or more turns over the pulley b of my adjusting device, thence over the ceiling demanded; or, used, by tying thereto. Fig. 2, an enlarged pulley j, and down to the lifter of the fire Prior to my invention, the only method. so far as I know, of adjusting the amount of opening of the dampers has been by using a chain and changing the length of the chain by means of a hook at the extremity thereof, hooking it into different links as occasion if a cord instead of a chain is knots in the cord and letting them out again for different changes of temperature. It is readily seen that this is a crude, and at the best unsatisfactory method of adjustin the drafts for changes of weather, an the purpose of my device is to provide .a means by .which the degree or amount of openin of the various dampers may be quickly agjusted by means of a revolving pulley or drum, and by providing a graduated edge and a pointer so that after experiment, the dampers may be instantly set for any condition of atmosphere.

In Fig. 1, my device is seen attached to the outer or free end of the diaphragm lever 1". Figs. 2, 3 and 5, however, disclose more completely the construction of my device. In these figures, a is a metallic arm or rod provided with the lugs at -a the bar a being adapted to be placed upon the flat side oi! the diaphragm lever r, and the lugs a -a being adapted to be bent over the upper edge of r, as shown best in- Fig. 4, which is a sectional View on the line a:w of Fig. 2. .In order to retain a in place upon the diaphragm lever an ordinary bolt or set-screw a is used. The outer extremity of the bar a carries upon it a revoluble drum 6 mounted upon a spindle c-c which goes through the bar a back by the nuts f-f', as shown best in Fig. 3. Between the bar a and the drum 7) is introduced the Washer e. The drum b is grooved upon the periphery as shown at b, Fig. 3, and is provided with a small screw for the purpose of insuring the chain or cord z from sliding upon the drum. The bar (I. also carries a projecting member a which serves the double purpose of an index pointer'and also to retain the cord or chain in place in the groove 7) of the drum 6. 'Ihe face of the drum b adjacent to the door flap a3.

and is secured upon the washer e is recessed as shown in Figs. 3 and 5 and in this recess is placed a split friction-washer d secured to the face of the drum by the screw (2', Fig. 5. The free end of the friction-washer d normally pro ects above the surface of the drum b and its tension is suflicient when the nuts f-f are screwed up to keep the drum b from revolving by the weightof the dampers, and yet not too great to prevent the drum from being moved by the fingers.

The outer face of the drum b, Fig. 2, is graduated at that portion adjacent or near to the pointer a, and may bear the letters m c z, standing respectively for I I O nnld cold and zero, and lndlcatlng the point where the periphery of the drum should be placed to suit these respective conditions of atmosphere.

The operation of my lows :-One free end of the cord 2' is attached to the lifter k of the fire-door flap and passes thence over the pulley j in the ceiling is, then downward about the drum 5, making two or three turns thereof clockwise, a loop being made over the screw 11 so as to insure the cord from slipping. The other free end of the cord 1? is then carried downward and fastened to the lowerdraft damper Z, as shown in Fig. 1. It will thus be seen that the drum b, the diaphragm lever r, and the cord 4' are practically integral, and as long as there is no revolution of the drum 7), the cord 71 and the attached dampers move with the diaphragm lever 7- as though the cord were fastened thereto directly. The relative positions of the lever 1' and the draft doors Z and h are determined experimentally while the drum 1) is loose upon the bar a, and havin been thus determined the cord 2' is fixed in place upon the drum by the screw 79 and the drum tightened by means of the spindle c and the nuts f-f. We will now suppose that an approach of colder weather requires the draft door Z to be open wider or longer and a corresponding quicker closing of the fire-door flap it," instead of shortening chains, or making knots in cords, all that is necessary is with the finger and thumb to revolve the drum b until the pointer (1* is nearer to or opposite the letter z on the periphery of the drum. This instantly changes the relative position of the diaphragm lever, the cord, and the flaps h and Z, thus insuring the required result. Upon the approach of milder weather, the drum is revolved until the pointer is opposite or near the letter m which will result in the fiap h of the fire-door being kept open for a longer period and the draft flap Z closed sooner and kept closed longer.

The drum 1) is adapted to carry either the cord, the chain, or any other flexible connection, and any required degree of opening device is as folor closing of the flaps h and -Z may be accomplished readily and quickly by means of the graduatedmarks upon the drum 6.

It is evident that by an auxiliary branch of the cord or chain a pipe damper may be controlled in the same manner as the ashdoor and fire-door dampers.

In practice my device has greatly increased the ease of adjusting the damper movements and has made the operation of house boilersvery much easier than by the use of the ordinary methods of damper regulation.

Having now described my invention, what I claim and desire to secure by Letters Patent is- 1. An adjusting device for diaphragmoperated dampers of steam boilers, consisting of a disk adapted to be revolubly mounted upon the diaphragm lever'of the boiler; a cord or other flexible body adapted to be peripherally wrapped around said disk intermediate its ends, means for holding the cord in fixed relation to said disk, the free ends of said cord being attached to the draft dampers of said boiler; and means for retaining said disk in any predetermined position of revolution upon its axis.

2. An adjusting device for diaphragmoperateddampers of steam boilers, consisting of a clamping member capable of being fixed upon the diaphragm lever; a graduated disk adapted to be revolubly mounted upon said clamping member, and having a circular lateral recess adjacent to its axis; a cord or other flexible body encircling said disk peripherally and adapted to be held in fixed relation thereto, the free ends of said cord being attached to the draft dampers of said boiler; a split lock-washer fitting said recess; and means for varying the pressure between said disk and washer.

3. An adjusting device for diaphragmoperated dampers of steam boilers consisting of a clamping member suitably fixed upon the diaphragm lever; a disk having graduated marks at the circumference thereof adapted to be revolubly mounted upon said clamping member and having a circular lateral recess adjacent to its axle; a cord or other flexible body encircling said disk peripherally and adapted to be held in fixed relation thereto, the free ends of said cord being attached to the draft dampers of said boiler; a split lock-washer fitting said recess, a bolt forming an axle for said disk and supported by the diaphragm lever, or by said clamping member: and nuts operating to vary the pressure between said disk and washer.

4. An adjusting device for diaphragm operated dampers of boilers comprising a supporting member, a disk revolubly-mounted thereon, a flexible member connected at its ends to said dampers, said flexible mem- In testimony whereof I affix my signature her being Wound on said disk and secured in presence of two witnesses. intermediate its ends to said disk whereby JAMES E. SULLIVAN. when said disk is rotated the dampers will Witnesses:

5 be selectively positioned, and means for re- Rosoon M. DEXTER,

taining said disk in adjusted positions. EDITH; M. BROMLEY. 

